Piezoelectric characteristics of low temperature sintering Pb(Ni_(1/3)Nb_(2/3))O_3-Pb(Zr_(1/2)Ti_(1/2))O_3 ceramics as a function of Pb(Mn_(1/3)Sb_(2/3))O_3 substitution

摘要

In this study, in order to develop the composition ceramics for multilayer ceramic for ultrasonic nozzle and ultrasonic actuator application, Pb(Ni_(1/3)Nb_(2/3)O_3 (abbreviated as PMS) substituted Pb(Ni_(1/3)Nb_(2/3)O_3-Pb(Zr,Ti)O_3 (abbreviated as PNN-PZT) ceramics were fabricated using two-stage calcinations method and Li_2CO_3, Na_2CO_3 and ZnO as sintering aids, and their piezoelectric and dielectric characteristics were investigated. With the increase of the amount of PMS substitution, electromechanical coupling factor (k_p), and mechanical quality factor (Q_m) of specimens showed the maximum value at 3 mol% substituted specimen while dielectric constant (ε_r) was decreased. At the sintering temperature of 900℃, the density, ε_r k_p, and Q_m of 3 mol% PMS substituted PNN-PZT composition ceramics showed the optimal values of 7.92 [g/cm~3], 959, 0.584, and 1003, respectively, for low loss multilayer piezoelectric actuator application.